Boulders (approx. true colors) - Sol 810

Caption NASA originale:"As NASA's MER Spirit began collecting images for a 360° panorama of new terrain, the Rover captured this view of a dark boulder with an interesting surface texture. The boulder sits about 40 cm(approx. 16" - inches) tall on Martian sand about 5 mt (approx. 16 feet) away from Spirit. It is one of many dark, volcanic rock fragments - many pocked with rounded holes called vesicles - littering the slope of "Low Ridge." The rock surface facing the rover is similar in appearance to the surface texture on the outside of lava flows on Earth.

Spirit took this approximately true-color image with the PanCam on the rover's 810th Sol of exploring Mars (such as April, 13, 2006), using the camera's 753-, 535- and 432-nanometer filters".